The Welshman has praised the Old Trafford-bound Dutchman's career, though refrained from expressing a desire to be his No.2, and urged the club to keep Rio Ferdinand & Patrice Evra
Goal reported in April that the Glazer family had picked the current Netherlands national team coach to succeed David Moyes, though he will not take over until after the World Cup.
And Giggs, who had been linked with the United hotseat himself, has praised Van Gaal's past achievements, which include titles in three different countries and Champions League success with Ajax.
“He's got a brilliant reputation and is a successful manager in different countries,” said the Welshman.
“He's taken Holland to the World Cup. Yes, he's got fantastic pedigree.”
When asked if he would want to be Van Gaal's assistant, Giggs added: “I have got to decide if I want to play or not so there is no point thinking if I want to be an assistant or if I want to be a manager somewhere else.”
Rio Ferdinand and Patrice Evra, meanwhile, are both set to leave the club at the end of the season when their contracts expire, but Giggs has urged United to retain their services.
“I'd like them to stay on. It's their decision, their contracts are both up,” the veteran midfielder continued.
“They have both given massive service to the club and they are both fit, and looked good last week. I don't see why not.
“I still think they have got a lot to offer. They've been great players and remain assets to a club like Manchester United.”